Hi,your irregular periods
are the result of Polycystic Ovarian Syndrome
diagnosed on ultrasound
.This syndrome is usually associated with weight gain, irregular periods and sub fertility. Thyroid disorders are also associated with it. Mainstay of treatment of this syndrome is lifestyle changes especially aimed at weight loss
. Medical treatment is basically for symptom relief.Diane would help regularise your periods at the same time providing contraception
. Though one of the side effects of Diane is weight gain it would surely relieve your irregularities in periods and subsequent need for repeated pregnancy tests. Best would be to combine it with weight loss measures like healthy diet and exercise.